Furnace.



gno. 682,673. Patented sept. t7, |901.

. o. M. cun'rts. i

FunNAcE. (Application filed Nov. 12l 1900.) (No Model.)

/ n mtmuunt trumnmt K ff UNITED STATES PATENT OFFICE.y

OMAR M. CURTIS, or woLcoTT, NEW YORK.

FU RNACE.

SPECIFICATION forming part of Letters Patent No. 682,673, datedSeptember 17, 1901.

Application tiled November 12. 1900. Seria-l No. 36,275. (No model.)

To aZZ whom it may concern:

Be it known that I, OMAR M. CURTIS, a citizen of the United States,residing at Wolcott, in the county yof Wayne and State of New York, haveinvented a new and useful Furnace, of which the followingis aspecification.

My invention is an improved furnace for evaporating fruit and dryinghops; and it consists in the peculiar construction and combi-- prove theconstruction of the fire-pot, so that the same is rendered more durable.

A further object of my invention is to effect improvements in theconstruction and combination of the jacket of the furnace and the frameof the feed-door to more securely fasten the feed-door frame to thefurnace.

A further object of my invention is to ef'- fect improvements in theconstruction of the feed-door, so that the same is provided with aninterior lining and an air-space between the lining and the feed-door toscreen the latter from the directly-radiated heat. A further object ofmy invention is to provide improved means to lock the grate in ahorizontal position and prevent the same from being dumped. l

In the accompanying drawings, Figure 1 is a perspective view of anevaporating and drying furnace embodying my improvements.

Fig. 2 is a vertical central sectional view of the same. Fig. 3 is ahorizontal sectional view of the same, taken on a plane indicated by theline d a of Fig. 2. Fig. t is a similar view taken on a plane indicatedby the line yb bof Fig. 2.

a single piece and is ofV inverted truncated conical form and has in itsupper side an annular groove 8, which. receives the lower edge of thejacket 3 and enables a cemented joint to be formed in the said groove toprevent the thereof and from its upper and lower side,

the said flange 12 fitting in the said countersink 9 and the lower sideof said flange 12 fitting in the groove 8 in the upper side of {irepot2. The feed-door 13, which is hinged to the frame 11 in the usualmanner, is provided onit's inner side with a lining-plate 14, which isoffset around its edges, as at 15, and thereby an air-space is formedbetween the said feed-door and said lining-plate. and the said air-spaceserve to protect the feed-door from the directly radiated heat from theinterior of the furnace, thereby preventing the door from warping andprolonging the life thereof. x nace is provided with the usual dangedopenings for the attachment of the smoke andradiating pipes, saidopenings being indicated at 16. The' said top 4 is rounded or ofconcavoconvex form and is adapted thereby to shed by gravity pieces offruit or hops which may fall thereon from the drying rack or. floorabove the furnace, thereby preventing the same from lodging and burningon the furnace-top and emitting smoke, which is injurious to the fruitor hops inprocess of evaporation or drying. The top 4. is provided onits underside withy an annular groove 17, which fits on the upper sideof the jacket-'section 3 and also receives the upper side of thefeed-door frame. A

It will be understood from the foregoing The latter that the feed-doorframe, which is set in the A countersink 9 of the jacket-section 3, hasits upper and lower sides fitted, respectively, in the grooves 17 of top4. and the groove 8 of the fire-pot, and hence the connection betweenthe said feed-door frame and the jacketsection of the furnace isstrengthened, and the feed-door frame is prevented from dropping whenthe bolts 18, which also secure the IOO same to the jacket-Section ofthe furnace, are burned oif.

The grate 19 is pivoted centrally on the grate-bar 20, which grate-barhas trunnions 2l at its ends which engage suitable sockets 22, formed inthe sides of the base-section l. The said grate-bar is disposed at rightangles to a piane intersecting the ash-door 6, and thereby the grate isadapted to be tilted and caused to dump to the front toward the saidash-door. When the grate is in a horizontal position, the ear 23 on thefront side thereof bears under the iange formed by the baseseetion labove the opening of the ash-door. In order to prevent the grate fromdumping itself, I provide a locking-bolt 24, which is secured in ahorizontally-disposed guideway 25, formed in the base-section l abovethe door G. The inner end of the said lookingholt when the same ispushed in, as shown in Figs. 2 and 4, bears under the front side of thegrate and prevents the latter from dumping. When the locking-bolt isdrawn outward, so as to cause the inner end thereof to disengage thegrate, the latter may be readily dumped, as Will be understood. The ear23 of the grate has an opening 23 for the reception of the inner end ofa bar or lever for shaking and dumping the grate.

Having thus described my invention, I claim- The combination of a re-pothaving a groove in its upper side, a jacket-section having its lowerside fitted in said groove, said jacket-section having an opening for afeeddoor, and an offset or conntersink around said opening, a top havinga groove in its lower side, to receive the upper edge of saidjacket-section, and a feed-door frame having a flange fitted in saideountersink or offset, the upper and lower edges of said flange engagingsaid grooves in said top and in said fire-pot, substantially asdescribed.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

OMAR M. CURTIS.

Witnesses:

EDWARD T. BROWN, ANsoN S. Woon.

